Talking-machine



H. E. REACH.

TALKING MACHINE. APPLICATION FILED 050.21.1919.

Patented July 12, 1921..

- UNITED FFICE- 7 l j eo ra aqme era-mean it ssie'ivoa'ro rimm i i i v 1 43 33 95' Q A GEPE MQAP WEB- 31$ a v i Application filed December 27, 1919. Serial No. 847,862.

To all whom it may concern:

Be it known that I, HOWARD E. REACH, a citizen of the United States, residing at Los Angeles, county of Los Angeles, and State of California, have invented a certain new and useful Improvement in Talking- Machines, of which the following is a speci-, fication.

The present invention relates to a means for engaging the turntable of a talking machine to stop rotation thereof and it has especial reference to a means actuable by the tone arm for automatically braking the turntable.

The prime object of the invention is to provide a graphophone in which the tendency of travel of the tone arm is always toward the center of the record, irrespec tive of the sound grooves and to utilize the gravitational force of the tone arm for actuating the brake for the turntable.

One of the chief obstacles at present encountered in the successful operation of the brake by the tone arm, is the lack of force or power of the tone arm to actuate the braking mechanism at the completion of the recordand this is due primarilyto the fact that the propelling means for the tone arm is the spiral sound grooves of the record, which are shallow and insufficient to overcome any but an excessively feeble resistance offered by a brake.

Where even an additional groove of smaller spiralityl and greater depth is provided in the record asa continuation of the spiral sound grooves to cause a sudden ac- .celeration of the travel of the tone arm, it

very frequently happens that the stylus, worn down bythe rotating disk, remains in the last groove of the record and fails to follow the terminal oove for causing the tone arm to actuate t e brake.

Therefore it is a main object of this invention to impart to the tone arm a constant tendency to gravitate or incline toward the center of the disk, without impairing the normal travel of the stylus in the sound undulations, and thereby to prevent the stylus from continuing in a circular groove that e obj ects herein mentioned and others hereinafter appearing are accomplished by the means shown in the accompanying drawings, which illustrate a preferred form of embodiment of the invention, and in which,

may be imperfectly formed.

Figure 1 is a perspective view of a talking machine showinga disk, turntable, brake for the-turntable and the tone arm, and

Fig. 2 is a fragmentary view of a tone arm showing its manner of mounting.

The invention consists essentially in so disposing the tone arm with respect to the disk and its supporting turntable that to it is imparted a tendency to gravitate to the center, whether the stylus of the sound box is in engagement with the grooves of the record or free of them, and such disposition may be effected by tilting the tone arm 1, as by inserting between the tone arm swivel or support 2 and the top of the cabinet 3, a tapering or wedge shaped washer or member 4 that will incline the tone arm swivel or support at an angle to the horizontal,

Specification of Iie tte'r s l'ateiit;

the degree of such inclination being gaged according to the amount of gravitational retaining the trigger 6 in position prior to actuation thereof b i the lever 5. y

In order more e ectually to insure the acceleration of the tone arm 1, an additional groove 10 may beprovided in the record,

but due to the increased force of the tone arm by reason of the inclination thereof as expla1ned, th1s pI'OVlSlOIl 1s not necessary, since the inchnatlon of the tone arm s sufficient to cause the stylus to leave the last groove of" the record and the tone'arm to gravitate to the center, whereupon the actuation of the brake will occur.

Obviously any means for tilting or disposing the tone arm atan angle to the horizontal may be employed, and hence other forms, arrangements or contrivances may be adopted for causing a gravitational inclination toward the center-of the record disk.

What I claim, is

1. In a phonograph, the combination of a support havin a pivotal axis forthe tone arm tilted to the vertical, a tone arm swiveled on said support so it will tend to gravitete towafd the center of the turntable, ztnl a brake mechanism a ctuableby the tone arm 7 l center of thetur'x ltab'lfe, and wbr'a'king mesh '10 at a sel'ected poirit in its movement. fr

2. In a phonograph, the combination ef 5 support having a pivotal axis for a tone arm,

means to tilt said support so that said axis, wi l b at an ang ta th verticalw tone arm.

"as soc ia ted' Keith said slippbrt so that it will tend tqugrayitate tqward,the

anism actuated bysa'id tone arm at a selected ointin its movement. t

H Ii tetimony whereof I have set my hand.

HOWARD E. t 

